Does my Mac stand a chance at running GC games?

[DefenderX]

Yeah, your Core 2 Duo @ 2.4 GHz is not perfect, but sufficient. Most games are playable, but don't expect too much: F-Zero GX, Zelda Twilight Princess etc. are heavy games and you won't get many FPS.

And your GPU is sufficient too. It should be able to handle 1.5x IR i think.